Why does my iphone keep getting this error?

I assume its an error at least. So when i'm listening to music on grooveshark about half through every song i get this stupid message that says "could not load movie" and resets the song or skips it. I'm very upset by this because i can't go a day without music and its been doing this for a week.

Use the stock iphone music app.

Having the same issue. Frustrating. Can't find any solutions. Hoping grooveshark help desk will address